package com.example.inami.util;

import com.alibaba.fastjson.JSONObject;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

public class RestTemplateUtil {

    private static class SingletonRestTemplate {
        static final RestTemplate INSTANCE = new RestTemplate();
    }

    private RestTemplateUtil() {
    }


    public static RestTemplate getInstance() {
        return SingletonRestTemplate.INSTANCE;
    }

    /**
     * post 请求
     *
     * @param url  请求路径
     * @param data body数据
     * @return
     */
    public static String post(String url, String data) {
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json; charset=UTF-8");
        HttpEntity<String> requestEntity = new HttpEntity<>(data, headers);
        return RestTemplateUtil.getInstance().postForObject(url, requestEntity, String.class);
    }

    public static JSONObject post(HttpHeaders headers, String url, Object data) {
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json");
        HttpEntity<Object> requestEntity = new HttpEntity<>(data, headers);
        return RestTemplateUtil.getInstance().postForObject(url, requestEntity, JSONObject.class);
    }

    /**
     * @param url   请求地址
     * @param token token
     * @return
     */
    public static String get(String url, String token) {
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json; charset=UTF-8");
        if (token != null) {
            headers.add("TGC", token);
        }
        HttpEntity<String> requestEntity = new HttpEntity<>(null, headers);
        ResponseEntity<String> response = RestTemplateUtil.getInstance().exchange(url, HttpMethod.GET, requestEntity, String.class);
        String responseBody = response.getBody();
        return responseBody;
    }

}
